Cita APA (7th ed.)

SALES, R. [. (1978). Children's Britannica 18: Tracks - walls and fences. Encyclopaedia Britannica International.

Cita Chicago (17th ed.)

SALES, Robin [Ed.]. Children's Britannica 18: Tracks - Walls and Fences. London: Encyclopaedia Britannica International, 1978.

Cita MLA (9th ed.)

SALES, Robin [Ed.]. Children's Britannica 18: Tracks - Walls and Fences. Encyclopaedia Britannica International, 1978.